Bearing puller



Aug. 4, 17936. f G.y HEEGEMAN BEARING FULLER Filed Dec. 3, 1935 2 Sheets-sheet 1 Inventor Aug.. 4, w36. G. HEEGEMAN BEARING PULLER Filed Deo. 5, 1935 2 Sheets-Sheet 2 y i y nvenlor fwyejfyeiizaz f I and 4 i l Allomeys' Patented Aug. 4, 1936 UNITI-1o STATES PATENT OFFICE BEARING, PULLER George Heegeman, Appleton, Wis. Application December 3, 1935,'Serial No. 52,720

1 claim. (c1. ca -es) This invention appertains to vnew and useful improvements in bearing puller devices and more particularly to a device of this character which is especially adapted for repairing magnetos where it is necessary to take oif the bearing race which is fastened to the collector ring.

The principal object of the present invention is to provide a puller of the character stated which can be easily adjusted into position for 1D use which when once positioned will serve effectively for removing the bearing race.

Various other important objects and advantages of theY invention will become apparent to the reader of the followlngspeciflcetion.

l5 In the drawings.

Figure 1 represents a side elevational view of the device.

Figure 2 represents a longitudinal sectional view of the tool shown applied to a bearing race.`

Figure 3 is an end elevational view of the tool. Figure 4 is an end elevational view of the tool looking at the opposite end from that shown in Figure 3.

Figure 5 represents an end elevational view of the chuck removed from the balance of the tool.

Figure 6 is a fragmentary longitudinal sectional view of the tool with an extension attachment.

Figure 7 represents a sectional view through the collar used with the extension applied.

-Referring to the drawings wherein like numerals designate like parts, it can be seen in Figure 2, that numeral 5 generally vrefers to ya magneto which is equipped with a bearing including a race 6, which must be removed when repairing the magneto.

In carrying out the present invention, the tool consists of an elongated internally and externally threaded tube I which is provided with a smooth polygonal shaped extension 8 at one end and an outwardly flaring chuck constructed at 9 in its opposite end. This chuck 9A is split inwardly as at I0 at regular intervals to provide elongated spring fingers II each of which is provided with an inwardly disposed lug I2 at its free end which can engage into the grooveway of the bearing race 6 as in the manner substantially shown in Figure 2.

Numeral I3 represents the elongated internally threaded sleeve for feedable disposition on the externally threaded portion of the tube I and as can be seen in Figure 2, when the llugs I2 have been properly disposed in opposition to the groove of the race 6, the sleeve I3 is fed toward rthe chuck 9 and by riding the outer end of the sleeve I3 extends the fingers of the chuck, the

ngers are vcontracted so that the lugs I2 engage into the groove of the race 6. Thus the tool is locked or retained on the race and the opera- 50 tion of pulling the bearing race is by feeding the lextension 23 grooved as at 2li.

elongated screw I4 inwardly through the tube 'I so that the inner end I5 will engage the shaft I6 of the magneto and thus cause a'contracting exertion between the adjacent end of the shaft IB and the raceway 6 which will cause displace- 5 ment of the raceway from the shaft. A polygonal head Il is provided on the outer end of the screw Id so that the screw can be conveniently rotated by a suitable wrench or the like.

Obviously the tool is not confined to the rel0 moval of magneto bearing raceways but can be used for various other purposes and to accommodate raceways or other similar structures a supplemental appliance generally referred to by numeral I8 in Figure 6 can be employed. This 15 structure I8 consists of the supplemental chuck I9 of spring metal, the same being of frustoconical shape with slits 20 formed therein and` extending inwardly from the large end thereof to define fingers 2| which have inwardly dis- 20 posed lugs 22 at their free ends. The reduced end of the chuck I9 is provided with a reduced This grooved reduced extension is a substitute for the bearing racev 6 of Figure 2, for in using the larger chuck 25 I9 the lugs I2 of the chuck 9 are engaged with the extension 23 so as to retain the extension in the frusto-conical shaped contracting sleeve 25 slidable on the chuck I9 by the merging of the sleeve I3 to contract the fingers 2l around 30 the object to be pulled.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing 35 from the spirit or scope of the invention as claimed hereinafter.

Having thus described the invention, what is claimed as new is:

A pulling tool comprising an internally and externally threaded tube, said tube being provided with outwardly diverged spring fingers in one end, each of the spring fingers being provided with an inwardly disposed lug at its free end, an elongated threaded member feedable through the tube, and an internally threaded sleeve on the tube for feeding action against the diverged fingers to contract the same, and an auxiliary chuck consisting of a frusto-conical shaped hollow structure slit inwardly from its large end at predetermined intervals to provide spring fingers, each of the said fingers being provided with an inwardly disposed lug at its free ond, an extension at its reduced end adapted to be engaged by the lugs of the first mentioned fingers, and a tapering sleeve for slidable disposition on the fingers of the chuck when the first mentioned sleeve is fed against the same.

GEORGE HEEGEMAN. 6 

